SW7091018_CURRENT PERMIT_20151015

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW Itgqza
DOC TYPECURRENT
PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE
�/i1,5Qb!3
YYYYMMDD

North Carolina Department of Environmental Quality
0&7RO
Pat McCrory
Governor
October 15, 2015
East Carolina University
Attn.: Mr. William Bagnell — Associate Vice Chancellor
1001 E Fourth Street
Greenville, NC 27858
Don Van der Vaart
Secretary
Subject: NPDES Phase II Stormwater Permit No. SW7091018 MOD#2
ECU — Health Sciences Campus Student Services Center
High Density Commercial Wet Pond Project
Pitt County
Dear Mr. Bagnell:
The Washington Regional Office received a complete NPDES Phase II Stormwater
Management Permit Modification Application for ECU — Health Sciences Campus Student
Services Center on September 15, 2015. Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set
forth in Session Law 2006-246, and Title 15A NCAC 2H.1000, We are forwarding Permit
No. SW7091018 MOD#2 dated October 15, 2015, for the construction of the subject
project. This Modification is to change the previously permitted bio-retention cell to an
infiltration trench system.
This permit shall be effective from the date of issuance until December 31, 2019, shall void
permit SW7091018 MOD issued on May 1, 2015 and shall be subject to the conditions and
limitations as specified therein. Please pay special attention to the Operation and
Maintenance requirements in this permit. Failure to establish an adequate system for
operation and maintenance of the stormwater management system will result in future
compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you
have the right to request an adjudicatory hearing upon written request within thirty (30)
days following receipt of this permit. This request must be in the form of a written petition,
conforming -to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714.
Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact me at [phone].
Sincerely,
Samir Dumpor, PE
Environmental Engineer
cc: Derick Blankenship, Stewart, Inc.
City of Greenville Building Inspections
,Washington Regional Office
Division of Energy, Mineral, and Land Resources . Land Quality Section
Washington Regional Office
943 Washington Square Mall, Washington, North Carolina 27889 - Phone: [phone] FAX: [phone]
Internet: http:l/portal.ncdenr.o[g/web/ldland-guality
An Equal Opportunity 1 Affirmative Action Employer— 50% Recycled 110% Post Consumer Paper

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
NPDES PHASE II STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
East Carolina University
ECU — Health Sciences Campus Student Services Center
Pitt County
FOR THE
construction, operation and maintenance of a wet detention pond and an infiltration
trench system in compliance with the provisions of Session Law 2006-246, and 15A
NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved
stormwater management plans and specifications and other supporting data as
attached and on file with and approved by the Division of Energy, Mineral, and Land
Resources (Division) and considered a part of this permit.
This permit shall be effective from the date of issuance until December 31, 2019, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.7 on page 3 of this permit. The stormwater
control within wet detention basin has been designed to handle the runoff from
823,589 square feet of impervious area and within an infiltration trench system
has been designed to handle the runoff from 14,590 square feet of impervious
area. .
3. The tract will be limited to the amount of built -upon area a indicated in Section 1.7
on page 3 of this permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 8

0
7
The built -upon areas associated with this project shall be located at least 50 feet
landward of all perennial and intermittent surface waters.
The following design criteria have been provided in the wet detention pond and
the infiltration trench and must be maintained at design condition:
Drainage Area West — wet pond_
a. Drainage Area:
Onsite, ft2
Offsite , ft2
b. Total Impervious Surfaces, ft2:
Buildings, ft2:
Parking, ft2:
Sidewalks, ft2:
Future Onsite, ft2:
Existing and Future Offsite:
C. Design Storm, inches:
d. Avg. Pond Depth, feet:
e. TSS removal efficiency:
f. Permanent Pool Elevation, FMSL.
g. Permanent Pool Surface Area, ft2
h. Permitted Storage Volume, ft3:
i. Temporary Storage Elevation, FM
j. Controlling Orifice:
k. Permitted Forebay Volume, ft3:
I. Receiving Stream/River Basin:
M. Stream Index Number:
n. Classification of Water Body:
27.01 acres
415,137
761,429
823,589
129,829
190,224
17,535
6,078
479,923
1.0
3.0
90%
25.00
42,110
40,349 at temporary pool el.
S L: 26.49
3.5" O pipe
32,543
Schoolhouse Branch 1 Tar -Pam River
28-93
"C, NSW"
Drainage Area East— Infiltration Trench
a.
Drainage Area, ft2:
60,113
b.
Total Impervious Surfaces, ft2:
14,590
C.
Design Storm, inches:
1.0"
d.
Trench Length ft:
40.50'
e.
Trench Width, ft:
30.50'
f.
Trench Height, ft:
2.00'
g.
Bottom Elevation, FMSL:
59.00'
h..
Bypass Weir Elevation, FMSL:
61.00'
i.
Permitted Storage Volume, ft3:
1,413
j.
Type of Soil:
Sandy Clay Loam
k.
Expected infiltration Rate, in/hr:
12.00
i.
Seasonal High Water Table, FMSL:
57.00' .
M.
Time to Draw Down, days:
0.04
n.
Receiving Stream/River Basin: Schoolhouse Branch 1 Tar -Pam River Basin
o.
Stream Index Number:
28-93
P.
Classification of Water Body:
"C, NSW"
IL SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
Page 3 of 8

3. The permittee shall at all time provide the operation and maintenance necessary
to assure the permitted stormwater system functions at optimum efficiency. The
approved Operation and Maintenance Plan must be followed in its entirety and
maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and re -vegetation of slopes and the vegetated filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of outlet structure, orifice device, level
spreader, filter strip, catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP. The
records will indicate the date, activity, name of person performing the work and
what actions were taken.
5. The permittee shall submit to the Division an annual summary report of the
maintenance inspection records for each BMP. The report shall summarize the
inspection dates, results of the inspections, and the maintenance work
performed at each inspection.
6. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
7. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
8. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
9. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
10. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
c. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
Page 4 of 8

11. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
12. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
13. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
Ill. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a completed Name/Ownership Change form, to the Division, signed by
both parties, and accompanied by supporting documentation as listed on page 2
of the form. The project must be in good standing with the Division. The approval
of this request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves the transfer request.
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
-6. The permittee grants DEQ Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and. reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
Page 5of8

10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Session Law 2006-
246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division of any name, ownership or mailing
address changes at least 30 days prior to making such changes.
Permit issued this the 15th day of October, 2015.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
c
for
Tracy E. Davis, PE, CPM
Division of Energy, Mineral, and Land Resources
By Authority of the Environmental Management Commission
Stormwater Permit No. SW7091018 MOD#2
Page 6of8

ECU -- Health Sciences Campus Student Services Center
Stormwater Permit No. SW7091018 MOD#2
Pitt Coup
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full
time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was'observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 7 of 8

Certification Requirements:
.1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
.3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
.9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans:
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DEMLR Regional Office
Pitt County Building Inspections
Page 8 of 8

ColeJenest
& Stone
Shaping the Environment
Realizing the Possibilities
Land Planning
Landscape Architecture
Civll Engineering
Urban Design
200 South Tryon Street, Suite 1400 Charlotte, NC 28202
p+704 376 1555 f+ 704 376 7851 urt+www.colejeneststone.com
Charlotte
Raleigh
{!`lo•e'H 4,;51iy ��.:.. (. '� ,� den �_•'r
East Carolina University — School of Dentistry OCT _ 8 2013
Storm Water Permit No, SW7091018
Pitt County ,MLA
Designer's Certification 1rr ° "' V r
I, R. Todd Fisher , as a duly registered Professional Engineer in the State of
North Carolina, having been authorized to observe periodically the construction of the
project,
ECU School of Dental Medicine, Pitt County, North Carolina
(Project)
for East Carolina University (Project Owner) hereby state that, to the best of my
abilities, due care and diligence was used in the observation of the project construction
such that the construction was observed to be built within substantial compliance and
intent of the approved plans and specifications.
The checklist on Page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
1. As -built pond surface area and storage volume are less than approved plan as
noted below:
Permitted Design
As -Built
C.
Pond Depth, ft av
3.87
3.46
TSS Removal Efficient
90%
85%
f.
Permanent Pool Elevation, FMSL:
25.0
25.0
ri.d.
g.
Permitted Surface Area PP, sf:
42,110
38,637
h.
Tem ora Pool Volume, cf:
70,349
94,050
Temporary Pool Elevation, FMSL:
26.49
27.15
j.
Controlling Orifice:
3.5" 0 orifice
3.5" 0 orifice
k,
Permanent Pool Volume, cf:
163,176
133,859
2. Pond outfall modified to incorporate a 30' vegetated filter stip.
3. Pond does not meet design criteria for 90% TSS removal as permitted, but does
meet design criteria for 85% TSS removal (SAIDA required = 2.66; SAIDA provided
= 3.26).
Signature: r_Z_�—
Registration Number: Z) 1(.3
Date:
111g11l1 f
SEAL
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East Carolina University — School of Dental Medicine
July 15, 2013
Page 2
East Carolina University — School of Dentistry
Storm Water Permit No. SW7091018
Pitt County
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
lotv 7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation, per the vegetation plan.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
_ U 11. The permitted amounts of surface area and/or voluCne have been provided.
R � � ArLAc%r.0 9:,kJM A'9Y at n %'4%kI%OfAS1
" 12. Required drawdown devices are correctly sized per the approved plans.
NU 13. All required design depths are provided.
(1' FCQ;NCE A% %K(mxi� S�An7 C+F- n .►A ��o►►S
W14. All required parts of the system are provided.
00 15. The required system dimensions are provided per the approved plans.
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+ 14nasrdu4projectslSDSKPROJ1502074_Correspondences%Construction AdminlstrettorSClose-OutRO712 - DWO Pond CertificatiGMEnglneer
Certification (Stomwater),docx

Land Planning
Landscape Architecture
Civil Engineering
Urban Design
C
Rgo o� �$i1 i• t GCS

ColeJenest
& Stone
Shaping the Environment
Realizing the Possibilities
Land Planning
Landscape Architecture
Civil Engineering
Urban Design
200 South Tryon Street, Suite 1400 Charlotte, NC 28202 Charlotte
p+704 376 1555 f+704 376 7851 ur4WWW.colejcnest5tone.com Raleigh
July 15, 2013
Mr. Mike Randall
North Carolina Department of Environment and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: 50207 — East Carolina University — School of Dental Medicine
Dear Mike:
Construction of the storm water management devices for the referenced project, as
permitted under the North Carolina Department of Environment and Natural Resources
Division of Water Quality Storm Water Permit Number SW7091018, has been
completed. A copy of the Designer's Certification covering the wet detention pond is
enclosed.
Due to field conditions that prevented excavation of the pond to the plan dimensions
(high groundwater and unstable soil), the as -built pond surface area and storage
volume are slightly lower than indicated in the permit. Accordingly, the pond cannot be
certified for 90% TSS removal, but does meet design criteria for 85% TSS removal.
The pond outfall was modified to incorporate a vegetated filter strip in accordance with
the NCDENR Stormwater BMP Manual. A copy of the pond as -built survey is attached.
Please let us know if you require anything further.
Best regards,
COLEJENEST & STONE, P.A.
l �Jc�eJ� 1
R. Todd Fisher, PE
Senior Project Manager
krm
Enclosure
cc: Ms. Gina Shoemaker, PE, LEED AP — ECU
Mr. Steve Correll — EYPIBJAC
OCT - 8 2013
45nasrdu5projectslSDSKPROJ1502075_Correspondences\Construction Administration0use-OA0712 - DWQ Pond Cerlificalion4071213 - M.
Randall - Stormwaler Certification. doc

DEMLR USE ONLY
Date Received
Fee Paid
Permit Number
5
5
Applicable Rules:
(select all that apply)
❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph II - Post Construction
❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stornwater Management Plan
❑ Other WQ M mt Plan:
State of North Carolina E C E i V E-
Department D
of Environment and Natural Resources
Division of Energy Mineral and Land Resources
S E P 15 2015
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
'his form may be photocopied for use as an original R 0
1. GENERAL INFORMATION PA,
1. Project Name (subdivision, facility, or establishment name- should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
ECU - Health Sciences Campus Student Services Center
2. Location of Project (street address):
Health Science Center, ECU Campus
City:Greenville
Cou nty:Pitt Zip:27858
3. Directions to project (from nearest major intersection):
Located at the intersection of N_, Eniergency Dr. and N. Campus Loop on the bast Carolina University Health
Science Campus. „
4. Latitude:35° 36' 39.14" N Longitude:77° 24' 18.81" W of the main entrance to the project.
11, PERMIT INFORMATION.
1,a.Specify whether project is (check one): ❑New ®Modification ❑ Renewal w/ Modificationt
tReneoals wills modifications also requires SWtt-702 -- Reliezvizl Application Fonu
b.If this application is being submitted as the result of a modification to an existing permit, list the existing
permit numberSW7091018MO12 Jts issue date (if known)Ma 1 2015 , and the status of
construction: ®Not Started ❑Partially Completed* ❑ Completed* *provide a designer's certification
2. Specify the type of project (check one):
❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state Stormwater management permit application, list the stormwater project nurnber,
if assigned, and the previous name of the project, if different than currently
proposed,
4. a. Additional Project Requirements (check applicable blanks, information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major ❑Sedimentation/Erosion Control: 5.54 ac of Disturbed Area
❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts
b. If any of these permits have already been acquired please provide the Project Name, Project/ Permit Number,
issue date and the type of each permit:
5. Is the project located within 5 miles of a public airport? ❑No ❑Yes
If yes, see S.L. 2072-200, Part VI: littp://portal.ricdejir.ot-g/web/Ir/rules-and-regulations
Form SWU-101 Version Oct. 31, 2013 Page I of

III. • CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization: East Carolina University
Signing Official & Title:William 13agnell - Associate Vice Chancellor
b.Contact information for person listed in item la above:
Street Address:1001 E. Fourth Street
City:Greenville State:NC zi p:27858
Mailing Address (if applicable):
City: State: zip:
Phone: (252 ) 328-6858 Pax: (252 ) 328-4259
Ernail:baV,[e-mail]
c. Please check the appropriate box. The applicant listed above is:
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (`Phis is the
person who owns the property that the project is located on):
Property Owner/Organization:
Signing Official & "Title:
b.Contact information for person listed in item 2a above:
Street Ad
City: State: zip:
Mailing Address (if applicable):
City: State: Zip:
Phone: ( ) Fax: ( )
Entail:
3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Organization:
Signing Official &:'Title:
b.Contact information for person listed in item 3a above:
Mailing; Address:
City:
5 to te: zip:
Phone: ( 1 Pax:
I7-mail:
4. Local jurisdiction for building permits: Greenville Community Development- Inspections
Point of Contact:Rene' DeShong Phone #: (252 ) 329, 4174 _
form SWU-101 Version Oct. 31, 2013 Page 2 of 6

IV, • PROJECT INFORMATION
1. In the space provided below, hriefly summarize how the stormwater runoff will be treated.
West Side - Runoff from the proposed project site will be routed into the existing stormwater system and _.
treated by an existing pond. East Side - Runoff from the building roof, parking area, and loading areas will
be directed to an underground infiltration alley. .
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW -1995 ❑ Ph Ii - Post Construction
3. Storniwater runoff from this project drains to the Tar-Paml
4. Total Property Area: 29.53 acres
River basin.
5. Total Coastal Wetlands Area: 0 acres
6. Total Surface Water Area: 0 acres
7. Total Property Area (4) -Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = `Total Project
Area`:5.54 acres
Total project area shall be calculated to exclude the follozoingg the nornial pool of iiupourded structures, the area
between the batiks of streams and rivers, the area below the Normal High Water (NHW) lure or Mean High Water
(MH1N) line, and coastal wetlands landward front the NHW (or MHW) line. The resultant pj'ect area is used to
calculate overall percent built upon area (BUA). Nat -coastal utetlatids latidzvaril of tire NHW (or MHW) litre tiny
be included in the total project area.
8. Project percent of impervious area: ("Total Impervious Area / Total Project Area) X 100 = 38.5 %
9. How many drainage areas does the project have? 2 (For high density, count I for each proposed eirgineered
stormwater BMP. For laid density and otlier projects, use 'I for the zoliole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drainage Area 1
Drainage Area 2
Drainage Area
Drainage Area _
Receiving Stream Name
Tar River
Tar River
Stream Class *
Q NSW
C; NSW
Stream Index Number *
28-93
28-93
Total Drainage Area (so
60,113 v
1,176,555
On -site Drainage Area (sf)
60,113 t/
415,137
Off -site Drainage Area (so
0
761,429 ✓
Proposed Impervious Area** (so
14,590 ✓
823,589
% Impervious Area** total
24.27 ✓
70,0 1
Im pervious,. Surface Area
Drains e Area 1
Drains e Area 2
Drainage Area—
Drainage Area_
On -site Buildings/I ats (SO
0
48,787
On -site Streets (so
0
On -site Parking (so
0
190,224 >/
On -site Sidewalks (so
14,590
17,535
Other on -site (so
0
81,042
Future (so
0
6,078
Off -site (so
0
479,923 ✓
Existing BUA*** (so
0
Total (so:
16,363
823,589
* Stream Class and Index Number can be determined at: tittla://portal.trcdenr.org/zveb/ziiVps/cstr/classificatiotrs
ltrr xrviaris area is defined as the built upon area including, but not Iitnited to, buildings, roads, parking areas,
sidlezoalks, gravel areas, etc.
* Report only tlurt amount of existing BUA that will renrain after developruetit. Do not report any existing BUA that
is to be renioved and which Will be replaced by new BUA.
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6

, T4 W'/
11. I -low was the off -site impervious area listed above determined? Provide documentation.
Projects in Union County: Contact DEAILR Central Office staff to check if the project is located within a Threatened d.
Endangered Species watershed that may he subject to more stringent sturarwater requirements as per 15A NCAC 02B .0600.
V. , SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from http://portal.ncdenr.org/web/wq/ws/su/bmp-manual.
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application
instruction sheet and BMP checklists are available from
http://porta1.ncdenr.org/web/wq/ws/su/statesw/forms_docs. The complete application package should be
submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the
interactive online map at http://portal-ncdetir.org/sti,eb/wq/ws/su/maps.)
Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions
for each submitted.application package from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms_docs.
Initials
1. Origbrol and one cola/ of the Stormwater Management Permit Application Dorm.
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form. (if required as per Part VIt below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR, (For an Express review, refer to
http://wwNv.enviielp.org/pages/onestopexpress.litniI for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treattiient/managementfor
the project. This is required in addition to the brief summary provided in the Project
Information, item 1.
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1/2
mile radius on the map.
7. Sealed, signed and dated calculations (one copy).
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW fines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
I. Details of roads, drainage features, collection systems, and stormwater control measures.
m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person, Provide documentation of qualifications and identify the person who
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
o. Drainage areas delineated (included in the main set of plans, not as a separate document).
Form SWU-101 Version Oct. 31, 2013 Page 4 of 6

I.I
p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SHWT elevations (Please identify
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"xI1" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verifij the SHWT prior
to srrbnrnittal, [phone].)
10. A copy of the most current property deed. Deed book: 1417 Page No: 458
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item 1a, 2a, and/or 3a per 15A NCAC 2I-1.1003(e).
'I'11e corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
http:// www.secret,iry.state. nc.us/Corporations/CSoarcli.aspx
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided
as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and
protective covenants forms can be downloaded from 11ttp://portal.ncdenr.org/web/lr/state-stornlwater-
forms does. Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any lot.
VIII. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer:Ryan I-larnbleton, P.E.
Consulting Firm: Stewart
Mailing Address:421 Fayetteville Street, Suite 400
City:Raleigh State:NC Zip:27601
Phone: [phone]ax: (919 380-8752
En1a il:r11a nlbletonQstewartinc.corii
IX. PROPERTY OWNER AUTHORIZATION (if Contact Inrfornrafiox, iternr 2 has been filled out, carrtplete flris
section)
1, (print or type xaine of person listed in Contact Innfornrnationr, item 2n) , certify that I
own the property identified in this permit application, and thus give permission to (Print or type nnanrne of person
listed in Contact Innforrnnatnon, item 1n) with (print or type narnre of organization listed in
Confacf Inrforrnation, itennn In) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Forn1 SWU-101 Version Oct. 31, 2013 Page 5 of

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back
to me, the property owner. As the property owner, it is my responsibility to notify DEMLR immediately and
submit a completed Name/Ownership Change Form within 30 days; otherwise 1 will be operating a stormwater
treatment facility without a valid permit, I understand that the operation of a stormwater treatment facility
without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement
action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
Signature: Date:
I, a Notary Public for the State of , County of
do hereby certify that
before me this day of
personally appeared
and acknowledge the due execution of the application for
a stormwater permit. Witless my hand and official seal,
SEAL
My commission expires
X. APPLICANT'S CERTIFICATION
1, (print or type name of person listed in Contact Information, item 1a) W� IP a rn BoonP�I ( _
certify that the information included on this permit application form is, to the best of my`nowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of the
applicable stormwater rules under 15A NCAC 21-1 .1000 and any other applicable state stormwater requirements.
Signature: Date: 1 ()
I, gtbtcca Bs 2-atll a)otaryPublicfortheSttateof Iy L ,County of
l do hereby certify thai , t �j i a rh !E • L7 Q Q 1't� personally appeared
before me this J— day of _ A u Q its 20 IS, and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal, t5 Oy—'A
NOTARY z y
PUBLIC zi
li
11rtt1ttt►►
SEAL
My commission expires 6 D Z Z 01
I:orn SWU-101 Version Oct. 31, 2013
Page 6 of 6

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RECEIVED
SEP 1 5 2015 Permit Number
(to be provided br DF.,4ILR)
leS DrainagcArea Numbcr:
Infiltration Trench Operation and Maintenance Agreement
e
•
l will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. 'These deficiencies can affect the integrity
Of structures, safety of the public, and the removal efficiency of the BN4P.
Important maintenance procedures:
— The drainage area of the infiltration trench will be carefully managed to reduce
the sediment load to the sand filter.
— Thc: water level in the monitoring; wells will be recorded once a month and after
every storm event greater than 'l.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench will be inspected once a quarter and within 24 hours after every
storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County), Records of
operation and maintenance will be kept in a known set location and will be available
upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will rernediate theproblem:
The entire BMP
'Trash/debris is present.
Remove the trash/debris.
The grass filter strip or
Areas of bare soil and/or
Regrade the soil if necessary to
other pretreatment area
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-tinie fertilizer application,
Sediment has accumulated to
Search for the source of the
a depth of greater than six
sediment and remedy the problem if
inches.
possible. Remove the sediment and
dispose of it iu a location where it
will not cause impacts to streams or
the BM P.
The flow diversion
'I'he structure is clogged.
Unclog; the conveyance and dispose
structure (if applicable)
of anv sediment off -site.
'The structure is damaged.
Make any necessary repairs or
replace if damage is too large for
repair.
Firm SW401-Inliltration "I'rcnch O&M-Rev.4
Pubc I of 3

•
0
Permit Number:
(to he provided by DEAILR)
13MP element:
Potentialproblem:
How I will remediate theproblem:
The trench
Water is ponding on the
Remove the accumulated sediment
surface for more than 24
from the infiltration system and
hours after a storm.
dispose in a location that will not
impact a stream or the BMP.
The depth in the. trench is
Remove the accumulated sediment
reduced to 75% of the original
from the infiltration system and
design depth,
dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are
Remove the plants, preferab[y by
growing on the surface of the
hand. If pesticide is used, wipe it on
trench,
the plants rather than spraying.
The observation well(s)
The water table is within one
Contact DEMLR Stormwater
foot of the bottom of the
Permitting staff immediately at
system for a period of three
919-707-9220.
consecutive months.
The outflow pipe is clogged.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged.
Repair or replace the pipe.
The emergency overflow
Erosion or other signs of
The emergency overflow berm will
berm
damage have occurred at the
be repaired or replaced if beyond
outlet.
re air.
The receiving water
Erosion or other signs of
Contact the N.C. Division of Water
damage have occurred at the
Resources 401 Certification Program
outlet.
staff at 919-707-8789.
Form SW401-Inliltration'I'rench O&M-Rev.4
Pabc 2 of 3

Permit Number:
(to be provided by DEAILR)
•
acknowledge and agree by my signature below that I am responsible for the
performance oi'the maintenance procedures listed above. I agree to notify DEMLR of
any problems with the system or prior to any changes to the system or responsible party.
Project noire: ECU - »SC Student Services Center
BjWP (hwirurge area marcher: 1 (East Drainage)
Print name: William Bagnell
Title: Associate Vice Chancellor
Eat aro Ina University
Address:
Phone
Signa
Datc:
Note:
The legally responsible party should not be a homeowners association unless
more than 50%ofthe lots have been sold and a resident ofthe subdivision has
been named the president.
® L, *RG 6t C _C * 1 t 11 i A , a Notary Public for the State of
N Ci , County of P I* - , do hereby certify that
William E . 8Q Q re l l �_ personally appeared before nie this _
day of , 2015 , and acknowledge the due execution of the
forgoing infiltration trench maintenance requirements. Witness my hand and official
seal,
•
.``` CA 18122
NOTARY z`
=� PUBLIC ;=
o:
ONORTN G,\N````
11111111111%0
SEAL_
it, We
e �EJ
My conim ission expires_ D R 1 o Z 1 z b 1 q
Form SW401-Infiltration -french 0&,M-IZev.4
Page 3 of 3

H
a.. i

Permit No.
(to be provided by DWO)
,dwAM&A
STORMWATER MANAGEMENT PERMIT APPLICATION FORM DR�
NOENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
!. PROJECT INFORMATION
Project name ECU Student Center
Contact person Ryan Hamhleton
Phone number
Date 14-Jul-15
Drainage area number 1 (east drainage)
Ill. DESIGN INFORMATION,'
Site Characteristics
Drainage area 60,113.00 flZ E
C
V
Impervious area 14,590,00 flz✓R �"' I
Percent impervious 24.3% %
Design rainfall depth 1.00 in SEP 1 5 2015
Peak Flow Calculations
1-yr, 24-hr rainfall depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr discharge
Post -development 1-yr, 24-hr discharge
*elPost 1-yr, 24-hr peak flow control
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5' runoff volume
Pre -development 1-yr, 24-hr runoff volume
Post -development 1-yr, 24-hr runoff volume
Minimum volume required
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Trent esign Parameters
Drawdown time
Perforated pipe diameter
Perforated pipe length
Number of laterals
Stone type (if used)
Stone void ratio
Stone is free of fines?
J
in
3.10
0,13
inlhr
1.85
f131sec
1.54
ft3lsec
-0 31
fl3isec
1,329.00 fl3 V
1,413.00 fl3 ✓ OK for non -SR waters
NIA fl3
NIA fl3
NIA fl3
#VALUE! fl3
NIA fl3
Sandv Clav Loam
�5.16 inlhr
57.00 fmsl
0.04 days OK
1$.00 in
0 fl
10
e
0.4
Y (Y or N) OK
#VALUE!
Yt/ ,.
Form SW401-Infiltration Trench-Rev.4 Parts !. & II. Design Summary, Page t of 2

Permit No
Trench Elevations
ttom elevation 59.00 fmsl OK
torageloverflow elevation fi . 0 fmsl
Top elevation 61.50 fmsl
Trench Dimensions
Length (long dimension) 40.50 ft
Width (short dimension) 30.50 ft
Height (depth) 2.00 ft OK
Additional Information
Maximum volume to each inlet into the trench? 0.37 ac-in OK
Length of vegetative filter for overflow N/A ft OK
Number of observation wells 4 OK
Distance to structure 35.00 ft OK
Distance from surface waters 50+ ft OK
Distance from water supply well(s) N/A ft OK
Separation from impervious soil layer N/A ft OK
Depth of naturally occuring soil above SHWT 2.00 ft OK
Bottom covered with 4-in of clean sand? Y (Y or N) OK
Proposed drainage easement provided? NIA (Y or N) OK
Capures all runoff at ultimate build -out? Y (Y or N) OK
Bypass provided for larger storms? Y (Y or N) OK
Trench wrapped with geotextile fabric? Y (Y or N) OK
Pretreatment device provided N/A
(to be provided by DW4)
Form SW401-Infiltration Trench-Rev.4 Parts k. & II. Design Summary, Page 2 of 2

Permit No
11
r]
Ill, REQUIRED ITEMS CHECKLIST
(to be provided by DWQ)
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials
Sheet No.
RAH
Plan Set
1. Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Trench dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
RAH
C5.10
2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing:
Bypass structure,
Maintenance access,
Basin bottom dimensions,
Basin cross-section with benchmark for sediment cleanout,
- Flow distribution detail for inflow,
Vegetated filter, and
Pretreatment device.
RAH
C5.10
3. Section view of the infiltration trench (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
RAH
SIA
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
RAN SIA 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWO, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
RAH C5.10 6. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
RAH SIA 7. The supporting calculations.
RAH SIA 8. A copy of the signed and notarized operation and maintenance (O&M) agreement.
NIA NIA 9. A copy of the deed restrictions (if required).
Form 5W401-Infiltration Trench-Rev.4
Part III. Required Items Checklist, Page 3 of 3

� STE WART
Infiltration Basin Sizing
East Drainage Area
Project ECU Student Center
Project No. C 14115
Date 2015.06,30
Storage Required for first inch over entire drainaue area
Drainage Area
Required Storage for 1 st inch of runoff
Total Drainage Area = 1.38 ac
Simple Method
Total Impervious Area= 0.33 ac
Percent Impervious = 24%
Rv = 0.05 + 0.009([)
1 = % impervious = 24%
Rv = 0.27 in
Volume = 1329 cf
Calculation Methods are taken from DEI-INR Stormwater Best Management Practices Manual, N v�ber 1995
0 1 —
Storage Volume Required = 1329 cu ft
Volume Provided
Length = 40.5 ft
Width = 30.5 ft
Denth = 2 ft
Stone Storage Volume = 2470.5 cu ft
Void Space = 0.4
Total Storage Volume Provided =
Drawdown Time
Infiltration Rate = 25.16 inlhr/sf
Depth of Storage = 24 in
Surface area = 1235.25 sf
Drawdown Time = 0.95 hr
Pipe Size =
18 in
Length of Pipe =
400.5 ft
Cross Sec Area=
1-77—s-ft
Pipe Storage Volume =
=
700
1 t -t-7C) O z � \ � 2---:) c-- ' � I

LETTER OF TRANSMITTAL
STEWART
7'CFIVE-
S E P 1 5 2015
TO
FROM
Samir Dumpor
Derick Blankenship
Water Quality Regional Operations Section
943 Washington Square Mall
Stewart
Washington, NC 27889
421 Fayetteville Street, Suite 400
Raleigh, NC 27601
[phone]
DATE SENT VIA
INARIrl
11.2015 Standard Shipping
PROJECT NUMBER PROJECT NAME
C14115 ECU Health Service Campus - Student Services Center
COPIES DESCRIPTION
1
Application Fee
2
Revised SIA sheets
2
O&M Agreement 1 Original + 1 Co
2
Permit Application 1 Original + 1 Copy)
2
Revised Plan Sheets
2
Geotechnical Report
For approval
❑
For review & comment
FEReturned
Returned for corrections
For your use
❑
Approved as submitted
after review
As requested
Approved as noted
Resubmit copies for approval
COMMENTS
SIGNED COPIED TO
Derick Blanke hip, EI
STRONGER BY DESIGN
421 FAYETTEVILLE ST. RALEIGH, NC T 919.380.8750
SUITE 400 27601 F 919.380,8752

STORMWATER IMPACT ANALYSIS
ECU HSC STUDENT SERVICES CENTER
RALEIGH, NORTH CAROLINA
EXECUTIVE SUMMARY
RECOV
SEP 15 2015
This Stormwater Impact Analysis has been prepared specifically to address the
requirements of the NCDENR Stormwater Management Design Manual, in order to
quantify the impact of the proposed development upon downstream systems. Per
State regulations the development must treat the 1" inch for 85% TSS removal
rate. The Total Nitrogen Export (TNE) and Total Phosphorus Export (TPE) is
provided for information for the parcel and is shown to meet the requirements of
4.0 Ib/ac/yr of TNE and 0.4 TPE through nutrient reduction from the BMPs.
The regulations are met through an on -site infiltration gallery (drainage area #1)
and through an existing wet pond located on the west side of campus (drainage
area #2) which has available 87,154 sf of impervious for future use. This project
utilizes 81,042 �sf of that available credit.
This submittal is a permit modification to existing permit No. SW7091018MOD,
dated May 1, 2015. The site is located within the drainage area associated with
the stormwater permit and includes the use of existing impervious credits available
within the western wet pond associated with the Dental School project constructed
in 2010. This modification is for Drainage Area #1 (East) to change the previously
permitted bio-retention area device to an infiltration gallery. Upon further testing
we were informed that the SHWT and infiltration in the exact area of the proposed
BMP was different than the previously tested areas adjacent to the BMP.
Specifically the latest infiltration testing indicates that the SHWT is only 83" below
existing grade but the infiltration rate is much higher than expected.
Site Information
The proposed site is located along Campus drive on the Health Science Campus and
is located on the split between two drainage areas. The project includes pavement
for loading and drop off area, a new building, associated patio, and walkways. See
drainage area breakdown and impervious breakdown in table 1.
0
vA�'! 0

'r
•
n
U
0
TABLE with IMPERVIOUS ARID DRAINAGE AREA
West Drainage (DA##2)
East Drainage (DA##1)
Imp. Area
Required to be
Imp. Area to be
treated by
Drainage
Impervious
treated by
Drainage
Impervious
Proposed BMP
Area (sf)
Area (sf)
Existing BMP (sf)
Area (sf)
Area (sf)
(sf)*
Existing Conditions
152,024
7,058
36,155
10,778**✓
Proposed
/
Conditions
1 134,600
81,042
81,042 v
60,113
25,368
*Proposed impervious area - existing impervious area within eastern drainage boundary
** Existing Impervious removed from site and used as credit for treatment calculations
The site is within the Tar -Pamlico River Basin but is not within any noted FEMA
Floodplain, The USDA Soil Survey Map indicates the soils on site consist of Wagram
loamy sands which are classified as Hydrologic Soil Group B.
Design Requirements
Drainage Area #1 (East),
The project meets the requirements of treatment of the first inch for 85% TSS
removal through the construction of a new infiltration gallery. This BMP is�ized for
the 14,590 sf of impervious. The infiltration gallery is comprised of an 18" HDPE
e er pipe ee in " perforated HDPE pipes wrapped in a clean crushed
stone blanket. Once the infiltration gallery has met its maximum storage volume,
(1" storm event), the remainder of water will be diverted downstream and tie into
the existing storm network.
The infiltration gallery is sized for the new impervious area minus existing
impervious removed from the site to provide treatment of the 1" storm.
Drainage Area #2 {West)
The western drainage basin includes the proposed building, associated site
improvements, utilities, and storm drainage which drains to the western pond on
the Health Science Campus. This wet pond was installed as part of the Dental
School project and was sized to included 87,154 sf of future impervious. The
proposed project 81,042 sf of impervious uses these available impervious credits.
SHWT and Infiltration results
See SHWT and infiltration studies conducted around the site. The existing
ground appears to have adequate infiltration rates for infiltration devices, (See
Appendix 4b).

Conclusions
The Tar Pam state rules are met through the offsite wet pond and an on -site
infiltration gallery. Based on the results of this analysis, the requirements of the
State Regulations have been met. Please see the attached appendices for
additional calculations.
C.

•
April 27, 2015
East Carolina University
Facilities Engineering and Architectural Services
1001 East Fourth Street
Greenville, North Carolina 27858
Attn: Ms. Gina Shoemaker, PE
Irerracon
RECEIVE'D
SEP 15 2015
Re: Second Letter Report of Seasonal High Water Table and Infiltration Testing
Proposed Health Science Campus Student Center
North Emergency Drive and North Campus Loop
Greenville, North Carolina
Terracon Project Number 72145069
Dear Ms. Shoemaker:
�rJA.usi
Attached with this cover letter is our consultant's report of Seasonal High Water Table and
Infiltration Testing for your proposed Health Science Campus Student Center in Greenville,
North Carolina.
This second letter report is in response to additional testing by Mr. Brian O'Haver representing
Stewart Engineering. The testing was performed at the location and depth selected by Mr.
O'Haver. A shallow test pit was excavated in order to assist with the testing. Please refer to the
attached drawing for the location of this additional testing.
Please review the report and let us know if you have any questions.
Sincerely,
Terracon Consultants, Inc.
Carl F. Bonner, PE
Principal 1 Office Manager
Attachment
is
Terracon Consultants, Inc. 314 Beacon Drive, Winterville, NC 28590
P 1252] 353-1600 F 1252] 353-0002 terracon.com Registered NC F-0869

•
•
LJ
r FRED D. SMITH SOIL CONSULTING.,
April 25, 2015
Mr. Carl Bonner
Terracon Consulting Engineers and Scientists
314 Beacon Dr
Winterville, NC 28590
Subject: Report of a Soil Evaluation for Stormwater Treatment
ECU Student Ctr Additional Testing
Greenville, NC
Dear Mr. Bonner,
This letter concerns the soil evaluation 1 performed at the above mentioned proposed site chosen for a
stormwater BMP. You authorized me to perform a soil evaluation to determine the depth to the `seasonal
high water table' (SHWT) at the site and an additional saturated hydraulic conductivity at a depth of 10
feet below the surface.
You provided me with a site drawing that shows the location of the proposed stormwater BW. The soils
were classified into the USDA Classification system and are presented in Table 1. The soil was evaluated
for depth to soil layers, colors, texture, structure, and consistency. The depth to the seasonal high water
table (SHWT) was determined by evaluating colors as explained below.
Seasonal High Water Table (SHWT)
The SHWT has become more frequently used as an indicator of the highest level of water table
fluctuations due to agricultural considerations, regulations for septic system designs and, more recently,
stormwater design. The SHWT is routinely estimated by Soil Scientists from soil morphology (soil
forming factors) and landscape position. Soil colors are evaluated because gray colors are associated with
saturated and chemically reducing soil environments- the presence or absence of iron. Red, reddish
yellow, brown, and brownish yellow colors are associated with aerobic and chemically oxidizing
conditions.
During weathering of soil minerals, over a period of time, soluble constituents are removed from the soil
profile and more stable compounds will precipitate. Iron is released from minerals and coats soil particles
with thin oxide coatings that give soils their red to yellow colors. The natural color of soil particles is
gray until they are coated with iron.
Soils also contain microorganisms that generate energy from the oxidation of soil organic matter. When
the soil becomes saturated from flooding or slowly percolating water, oxygen is removed from the soil
layer and anaerobic conditions prevail. Under anaerobic conditions, other types of soil microbes can
derive energy the chemical reduction of oxidized iron and change its state from ferric to ferrous iron (loss
of an electron). The requirements for this chemical -microbiological process are the absence of oxygen
for several weeks, a temperature of at least 41 degrees (F), and the presence of organic matter (roots, etc).
During periods of alternative wetting and drying cycles, or SHWT cycles, ferrous iron may move short
distances and precipitate during the drying (reoxidation) process. These mottling patterns are called
redoximorphic colors.
Soil Scientists use the Munsell Color System to evaluate the degree of color changes visible in the soil.
Low chroma colors are considered to be gray or black in the Munsell System (chroma less than 2). We
Offi-valMobile (252) 9084369
Post Off7ae Box 'If 75 — Nashville, North Carolina 27856

E
•
normally consider that once a soil layer has about 5% gray colors and redoximorphic patterns (red -
yellow colored mottles), then that soil is saturated at least 21 days and qualifies as a St WT.
Soils and Groundwater
The soils are described in detail in Table 1. Groundwater was not encountered in the baring. Sail color rj
7
patterns indicate that the SHWT is at 83 inches beneath the surface.
The saturated hydraulic conductivity of the loamy sand layer at 10 feet is computed to be 25.16 inches
per hour.
Based on the similarity of texture in the layers from about 75 inches beneath the surface to 10 feet
beneath the surface, I would expect the soil permeability to be similar at these depths.
1 appreciate the opportunity to work with you on this project. Please contact me if you have questions or
need additional information.
S' erely,
�: �) J � �
Fred D. Smith
Licensed Soil Scientist��/�
Off'r-ce/Nobile [phone]
Post Office Box 1175 -- Nash vPlle, North Carolina 27856

0
0
0
Table 1
Soil Descriptions
ECU Student Center Additional testing
Greenville, NC
HA1&2
Horizon/
Texture
Color and description
Depth
inches
0-33
Sandy loam to clay
Very firm layers of compacted topsoil and gravelly pale
fill
brown sandy loam and reddish yellow clay. Massive.
8133 - 73
Sandy clay loam
Reddish yellow (7.5YR 618) firm; weak, medium, subangular
blocky structure. Few faint ciuoma 3 mottles in lower part of
layer.
C / 75-83
Loamy sand
Pale brown 10YR 7/4 or 7/3 ; granular structure.
C 2 / 83 -105
Loamy sand with
Reddish yellow (7.5YR 7/6) with gray mottles (7.5 YR 6/2)
sandy loam fences
0 / 105 - 120
Loamy sand/ sand
Red, reddish yellow, and gray
Ofiice/Moblle [phone]
Post Office Box 1175 — Nashville, North Carolina 27856

0
1--
�PercolatioWbr Ksat Rates using Aardvark Soil Permeameter 70erc Rate: min/in Ksat: inlhr
LR: gdsf
Site: ECU STUDENT CTR
Date: 4/2412015 Operator: FDS Boring Number: 1
Soil Series. unknown Soil Horizon: C Boring Depth (in):: 10FT
Diameter of HoMln): 3.6 Water Column Height (in): 0 Head Conversion Factor ( i=): 0.5
Boring Conversion Factor (BCF): 1.65 Design Loading Rate - Ksat,14.98`safety factor of 0.06 to 0.6 system dependent
Boring Conversion Factor (BCF) = (rad)square /5.06 for Aardvark Reservoir
BCF of 4 in auger is 4.25 in diameter boring =1
BCF of 3.25 in auger is 3.5 in diameter boring = 1.65
BCF of 2.75 in auger is 3.0 in diameter goring = 2.25
Head Conversion Factor (HCF) = Water Column Ht inches / 6 inches, or Htcm/15cm
Example is 3.5in boring with 7 in water column in goring, 0.5 in head drop over 45 minutes
in a structureded clay loam soil
F Value (Radcli a and West, 2000)
Borehole diameter
Texture
3.5 in
4.0 in
3.0 in
Sands
0.107
0.124
0.09
Structured foams and clays
0.082
0.096
0.068
Unstructured
foams and clay
0.048
0.057
0.041
Time TO
Time x
Time
Hours
Reservoir
Reservoir
Reservoir
Percolation
BCF
JHCFJ
Percolation
F value
Ksat
Design Loading
2400 hours
2400 hour's
Elapsed
Elapsed
Reading, in
Reading In
Change
Rate (minlnn)
Rate
from table
= F(1/P)
Rate gdsf
ti
t+1
(ti+1)-tl
dt/60minlhr
hi
h+1
(h+1)-hi
dtldh
AdJusted
with a 0.10
dt
dh
(P-HCF)IBCF
Safety Factor
initial
next
Initial
next
P
Ad) P
of Ksat
min
hr
in
in
in
minlin
min/in
in/hr
gdsf
Examp a 08:0
8:45
4
0.75
14.5
14
0.5
9
1.
1.17
64
0.082
0.08
0.12
10:12
10:14
2
0.033333
15.9
14.3
1.6
1.25
1.65
0.5
0
0.107
16.95
50.71
1
1 .16
2
0.03333
14.3
11.5
2.8
0.714285714
1.66
0.5
0
0.10
29.6
88.74
10:16
10.18
2
0.03333
11.5
9.5
2
1.65
.5
0
0.10
21.19
63.39
1 8
1 :20
2
0.033333
6.9
2.6
0.769230769
1.65
0.5
0
0.107
27.54
82.41
10:20
0:22
2
0.033333
8.9
4.8
2.1
0.952380952
1.
0.5
0
0.107
22.25
66.56
10:22
10.24
2
0.033333
4.8
2.4
2.4
0.833333333
1.65
0.5
0
0.107
26.42
76.06
10:24
10:26
2
0.033333
2.4
1 0
2.4
0.833333333
1.65
0.5
0
0.107
25.42
76.06
0:26
2
0.033333
1
0
#D !
1.65
0.5
AD V 0!
0.107
0.00
10:281
1 2
0.033333
1 1
0
IV/0!
1. ZT
0.5
D17/0!
0.107
370
STEADY STATE ARITHMETIC
AVERAGE
of
last 3 readings
Pedon Description STARTED SOAK AT 10:45. REFILLED RESERVOIR
TWO TIMES
Depth
Horizon
Color
Texture
Structure
Horizon Notes
ite Notes:
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HEALTH SCIENCES CAMPUS
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FOR PRICING ONLY
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EAST CAROUNA UNIVERSITY
GREENv1ttE, NORTH CAROLINA
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Permit Number:
0 t S (to be provided by DWO)
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
BIORETENTION CELL SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 11l) must be printed, filled out and submitted along with all of the required information.
4 ; r' +a`�',i�;n ' F' '�. '14• 3 !�S" 1z: "(� ilil M �S ?, Ut-"7i _ �,�� i r-i'"� 1 'i.- p�:+ <+
I. PROJECT INfORMATIONr_- t. ���..:y�.�na�;!f�"e._.,�+�,".�o�,r�v,,,;�-mot ', 3s1�"1`w�.� . �� i .�..�`: - i�.: ,i2� ?�?��s,•,�:`` .��r�w.ue :ra�'..:L�`,
Project name ECU Student Center
Contact name Ryan Hambleton
Phone number
Date 'Apra16, 2015
Drainage area number i1 (east drainage)
II.'DESIGN:INF R y,.. } r, 7 °. ' I ` "' N'`
0 144ATION.,r � �.'.e .f . �v,.::d';'t �'�..;� �.�%� � ';,�
Site Characteristics
Drainage area r -60,113 ft2 ✓
Impervious area i 14,590 ft2 ✓
Percent impervious 24.3% % I
Design ralnfatl depth i. 1.0 inch v'� �i GaL.nvn
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak control
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5" runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Cell Dimensions
Ponding depth of water
Ponding depth of water
Surface area of the top of the bioretention cell
Length:
Width:
-or- Radius
Media and Soils Summary
Drawdown time, ponded volume
Drawdown time, to 24 inches below surface
Drawdown time, total:
In -situ soil.•
Soil permeability
Planting media soil;
Soil permeability
Soil composition
% Sand (by volume)
% Fines (by volume)
% Organic (by voiume)
i N (Y or N)
in
—
inlflr
ft3lsec
ft3lsec
i
ft3isec
YIN z H d V
3
t 1,345.6 ft ✓
I
1,350.0 ft' ✓
OK
L
_ J
! ft3
ft3
ft3
0 ft1
ft3
I 12 inches OK
1.00 ft
11,450.0 f12
OK
i '44ft
OK
i ..• 45 ft
OK
E. ft
i 1 hr
OK
17 hr
OK
28 hr
0.05 inlhr
Insufficient. Increase infiltration rate or include underdrains.
1.50 inlhr
OK
85%
OK
t 10%
OK
.5%
OK
Total: 100%
Phosphorus Index (P-Index) of media 20 (unitless) OK
Form SW401-Bioretention-Rev.8
June 25, 2010
Parts I and 11. Design Summary, Page 1 of 2

Permit Number,
(to be provided by D WQ)
Basin Elevations
Temporary pool elevation
60.25 fmsl
Type of bioretention cell (answer "Y" to only one of the two following
questions):
is this a grassed cell?
Y (Y or N) OK
is this a cell with trees/shrubs?
N (Y or N)
Planting elevation (top of the mulch or grass sod layer)
59.25 fmsl
Depth of mulch
2 inches OK
Bottom of the planting media soil
56.08 fmsl
Planting media depth
3.17 ft
Depth of washed sand below planting media soil
0 ft
Are underdrains being installed?
Y (Y or N)
How many clean out pipes are being installed?
4
OK
What factor of safety is used for sizing the underdrains? (See
t0
OK
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
1 ft
the bottom of the cell to account for underdrains
Bottom of the cell required
55.08 fmsl
SHWT elevation
fmsl
Distance from bottom to SHWT
55.08 ft
OK
Internal Water Storage Zone (IWS)
Does the design include IWS s
Y (Y or N)
Elevation of the top of the upturned elbow
57.08 fmsl
Separation of IWS and Surface
2.17 h
OK
Planting Plan
Number of tree species
0
Number of shrub species
0
Number of herbaceous groundcover species ;
1
Recommend more species.
Additional Information
Does volume in excess of the design volume bypass the I
f
Y
(Y or N)
bioretention cell? ,
Does volume in excess of the design volume flow evenly distributed !.
N
(Y or N)
through a vegetated filter? {
What is the length of the vegetated filter?
ft
Does the design use a level spreader to evenly distribute flow? 1.:
i
(Y or N)
Is the BMP located at least 30 feet from surface waters (50 feet if r
f
Y
1(Y or N)
SA waters)?
Is the BMP located at least 100 feet from water supply wells? I
Y
(Y or N)
Are the vegetated side slopes equal to or less than 31?
Y
(Y or N)
Is the BMP located in a proposed drainage easement with access I
'
Y'
(Y or N)
to a public Right of Way (ROW)?
Inlet velocity (from treatment system) s
ft/sec
Is the area surrounding the cell likely to undergo development in the
N
(Y or N)
future?
Are the slopes draining to the bioretention cell greater than 20%? 1
N
(Y or N)
Is the drainage area permanently stabilized?
Y
(Y or N)
Pretreatment Used
(Indicate Type Used with an 'X' in the shaded cell)
Gravel and grass i
(flinches gravel followed by 3-5 ft of grass)
X
Grassed swage
Forebay i
Other
X
OK
Excess volume must pass through filter.
OK
OK
OK
OK
OK
OK
OK
#VALUE!
Form 5W401-Bioreten0on-Rev.8
June 25, 2010
Parts I and 11. Design Summary, Page 2 of 2

Permit No:
(to be assigned by DWQ)
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below, If a
requirement has not been met, attach justification.
Pagel Plan
Ini ' s Sheet No.
G 510
1. Plans (V - 50' or larger) of the entire site showing;
Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Cell dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW),
Clean out pipe locations,
Overflow device, and
Boundaries of drainage easement.
C S/O
2. Plan details (1" = 30' or larger) for the bioretention cell showing:
Cell dimensions
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW).
Design at ultimate build -out,
Off -site drainage (if applicable),
Clean out pipe locations,
Overflow device, and
Boundaries of drainage easement.
Indicate the P-Index between 10 and 30
G/d
3. Section view of the bioretention cell (f' = 20' or larger) showing:
Side slopes, 3:1 or lower
Underdrain system (if applicable), and
Bioretention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
{
SHWT level(s), and overflow structure]
/!
4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results
of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation
request form. County soil maps are not an acceptable source of soils information. All elevations shall be
in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include:
Soil permeability,
Soil composition (% sand, % fines, % organic), and
P-index.
�/J
`v r' �U
5. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing:
A variety of suitable species,
Sizes, spacing and locations of plantings,
Total quantity of each type of plant specified.
A planting detail,
The source nursery for the plants, and
Fertilizer and watering requirements to establish vegetation.
A construction sequence that shows how the bioretention cell will be protected from sediment until the
(� ntire drainage area is stabilized.
tE 7. The supporting calculations (including underdrain calculations, if applicable).
8. A copy of the signed and notarized inspection and maintenance (AM) agreement.
9. A copy of the deed restriction.
Form SW401.61oretention-Rev,7 Pan III, Page 1 of 1

Pcrmit Number:
(10 be provided by D111Q)
Drainage Area Number:
Bioretention Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal - —
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request. �, k
Inspection activities shall be performed as follows. Any problems that are foundlshall 2015
be repaired immediately.
BMP element.
Potential roblems:
How I will remediate the roblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable),
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid .
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with dean stone.
applicable).
Form SW401-bioretention O&M-Rev.3
Page I of 4

r
BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Flow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
Iayer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum de th of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic lime shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form SW401-Bioretention O&M-Rev.3
Page 2 of 4

BMP element:
Potential roblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
ou tlet.
733-1786.
Form SW40 I -Bioretention O&M-Rev.3 Page 3 of 4

Permit Number:
(10 he provided by D1VQ)
I acknowledge and agree by my signature below that 1 am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Projecl name:ECU HSC Student Services Center
BMP drainage area number:
Print name: 10-, I( 1' 0.rrr &- , �Ra 01 m.I
Title: A-)SOcAdta-y;Ce Nancelloe- ov� u.5 CJ,J_y e ra:6 n�--
Address: 1U01 i2anf qn4 54ree-t ar-OIX4 Un)Ver-n-i-.
Phon
Sign;
Date
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I T it- b u- C V'--B ii: -Z C H
a Notary Public for the State of
N C/ , County of P t ff , do hereby certify that
w i 11 l Q rn r. b a q nL I personally appeared before me this / 5-
day of AR r, and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
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Form SW401-13ioretention ISM -Rev. 2
Page 4 Of 4

Supplemental to Form SW401—Bioretention I&M-Rev 2
Project name: ECU HSC Student Services Center
BMP Drainage area number: BMP#1 — Bio-retention Area
Inspection Activities below shall be performed for the selected bio-retention cell and are above and
beyond the standard Operation and Maintenance Agreement
- Enhanced trash clearing may be required within the inlet device, pipe, and media area. Be
prepared to remove trash/ debris as needed but at a minimum once a month.
- Inspection of inlet in bio-retention cell should be accomplished after each rain storm as
indicated in the I&M. If infiltration is not removing standing water within the inlet and inlet
pipes within 5 days the use of Bti (Bacillus thurengiensis israeliensis) may be needed to treat for
mosquito and larvae during the summer months.
- Removal of accumulated sediment at the inlet and associated pipes shall be completed at least
every 6 months and more if sediment accumulation is above 50% of the pipe at each cleaning.
- 11' annual inspection shall include video examination of inlet and outlet pipes to and from bio-
retention cell to verify no cracks, gaskets are intact, and general pipe condition. Future video
inspection should be done every 5 years.
- Only triple shredded hardwood mulch should be used for the bio-retention area, both in the
initial installation and future maintenance.

7
ROY COOPER
Gnvernor
MiCHAEL S. REGAN
Secretary
S. DANIEL SMITH
! !ri'erlm nirector
NORTH CAROLINA
Environmental Quality
April 22, 2019
East Carolina University
Attention: William Bagnell, Associate Vice Chancellor
1001 E. Fourth Street
Greenville, NC 27858
Subject: NPDES Phase II Stormwater Permit Renewal
Stormwater Management Permit SW7091018
ECU — Health Sciences Campus Student Services Center
Pitt County
Dear Mr. Bagnell:
A Division of Energy, Mineral, and land Resources file review has determined that
Stormwater Permit SW7091018 for a stormwater treatment system consisting of a wet
detention pond and an infiltration trench system serving the ECU -- Health Sciences
Campus Student Services Center located at the intersection of N. Emergency Dr. and
N. Campus Loop in Greenville, NC expires on December 31, 2019. This is a reminder
that permit renewal applications are due 180 days prior to expiration. We do not have a
record of receiving a renewal application.
Please submit a completed permit renewal application along with a $505.00 fee for
permit renewal. Also, it was noted in the file review that a designer's certification that the
project was constructed in accordance with the approved plans as required by the
permit has not been submitted. Please include this with your application. Permit
application forms for renewal can be found on our website at:
littos://clea.nc.p-ov/about/divisions/enerEv-mineral-land-resoiirce?sL�u-iier,Qv-rtiiric ral-land
rules st rmwaterr-program-post-construction. North Carolina General Statutes and the
Coastal Stormwater rules require that this property be covered under a stormwater
permit. Failure to maintain a permit subjects the owner to assessment of civil penalties
If you have questions, please feel free to contact me at [phone]. 1 will be glad to
discuss this by phone or meet with you. If you would like, 1 can e-mail you a copy of the
application forms. You can request a copy by e-mailing me at
ro er.thor a ncdenr. ov.
Sincerely,
Ro er K. Thorp
Environmental Engineer
,ii c.�,rnwn
n.e..a..r.e o.w.Mr�o�rro
North Carolina Department of Environmental Quality I Division of Energy. Mineral and land Resources
Washington Regional Office 1943 Washington Square Mall I Washington, North Carolina 27889
252.946.6481